Open tunings rely upon ringing strings and sympathetic vibration etc, they are very well suited to music that does not modulate far from the home key.
on certain keys on the guitar this can be achieved to a more limited extent in standard tuning, standard tuning is a very versatile tuning, it is particularly good for ragtime music and music that involves moving through different keys.
to be able to play competently in standard and open tunings is in my opinion the musical goal I aim for with the guitar.
PIERRE BENSUSAN has taken DADGAD and shown what can be achieved by a virtuoso guitarist.